Electromagnetically driven valve control apparatus and method

Details Electromagnetically driven valve control apparatus and method Electromagnetically driven valve control apparatus and method

2005-09-06

2005-09-06

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

Electrical system

C251S129150, C251S129160

Reexamination Certificate

active

06938591

ABSTRACT:
An electromagnetically driven valve control apparatus and method are provided for an electromagnetically driven valve which has a movable element that is driven by cooperation of a spring force and an electromagnetic force, and a valve body engageable with the movable element, and which causes an open-close motion of the valve body due to the movable element engaging with the valve body in accordance with the driving of the movable element. Positional information regarding the movable element is detected, and adjustment of an electromagnetic force for driving the movable element is performed so that the movable element reaches a target operation state based on the positional information detected and a model of the electromagnetically driven valve obtained as a spring-mass vibration system. It is determined whether the movable element is operating in a first state of engagement with the valve body or the movable element is operating in a second state of disengagement from the valve body based on the positional information detected. Changes in a model parameter of the model in the adjustment are determined corresponding to the determined state. Therefore, the control apparatus and method are able to always set suitable model parameter changes in the actual spring-mass vibration system, and are able to improve the precision in the control of the electromagnetically driven valve using an appropriate model.

REFERENCES:
patent: 6390039 (2002-05-01), Fuwa
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patent: 2002/0014213 (2002-02-01), Fuwa
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patent: A 2001-221022 (2001-08-01), None
patent: A 2001-221360 (2001-08-01), None

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